PMID: 12786371Jun 6, 2003Paper

Manipulation of anchoring strength in an azo-dye side chain polymer by photoisomerization

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
L T ThieghiD T Balogh

Abstract

The generation of surface anisotropy by photochemical means has been proposed as an attractive method to align liquid crystals. In this paper, we present an experimental study of the alignment induced on a liquid crystal by a polymer film containing azo-dye groups in the side chain. Optical measurements were performed in nematic liquid crystal cells to determine the azimuthal and zenithal anchoring strengths as a function of the irradiation energy and chromophores concentration. It was observed that the director tends to align perpendicular to the polarization direction of the incident light and the orientation process consists essentially of a rotation of the director in the plane parallel to the boundary surfaces. However, the concentration of azo-dye groups in the polymer film must exceed a minimum value to get a macroscopical effect on the liquid crystal alignment. It is shown that the azimuthal anchoring strength can be varied two orders of magnitude by controlling the irradiation energy and azo-dye concentration.

References

Jan 5, 2002·Chemical Reviews·Kunihiro Ichimura
May 15, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·G BarberoL Komitov

❮ Previous
Next ❯

Citations

Mar 3, 2017·Physical Chemistry Chemical Physics : PCCP·Hajnalka NádasiFumito Araoka
Feb 21, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Alexei D KiselevDan Ding Huang
Aug 16, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·L T ThieghiE A Oliveira
Oct 26, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·F BataliotoL R Evangelista
Oct 13, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·R RossatoE K Lenzi
Oct 10, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·I H BechtoldE A Oliveira
Apr 2, 2010·ACS Applied Materials & Interfaces·Aaron M LoweNicholas L Abbott

❮ Previous
Next ❯

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
I H BechtoldE A Oliveira
Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
J J BonventE A Oliveira
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
V G ChigrinovHoi Sing Kwok
© 2022 Meta ULC. All rights reserved